Question 338509
Here are both curves graphed about the axis of symmetry,

Males, about {{{x=1990}}}
{{{drawing(300,300,-20,20,-20,80,grid(1),
circle(81-90, 43.4,0.62),
circle(83-90, 39.6, 0.62),
circle(85-90,  26.7, 0.62),
circle(86-90, 25.2, 0.62),
circle(89-90,22.6, 0.62),
circle(91-90, 22.6, 0.62),
circle(94-90, 27.3, 0.62),
circle(95-90, 28.5, 0.62),
circle(96-90, 29.1 , 0.62),
graph(300,300,-20,20,-20,80, (x-90+90)^2+ 20.2))}}}

.
.
.
Female, about {{{x=1988.5}}}
{{{drawing(300,300,-20,20,-20,80,grid(1),
circle(81-88.5, 41.7,.62),
circle(83-88.5, 40.5,.62),
circle(85-88.5, 27.7,.62),
circle(86-88.5, 27.0,.62),
circle(89-88.5, 23.5,.62),
circle(91-88.5, 25.6,.62),
circle(94-88.5, 28.9,.62),
circle(95-88.5, 29.5,.62),
circle(96-88.5, 31.0,.62),
graph(300,300,-20,20,-20,80, (x)^2+ 23.5))}}}